Flanged Hex Head Bolts
Flanged Hex Head Bolts are integrated fasteners combining hex head and flange face, produced in accordance with DIN6921, ISO4162 standards. The integrated flange replaces separate flat washers, evenly distributing clamping pressure and preventing loosening caused by washer displacement. When tightened, the flange surface closely fits the workpiece surface to improve sealing and anti-slip performance.
Handan Hengmai Fasteners Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of flanged hex head bolts in China. As we have world-leading production equipment and strong manufacturing capabilities, we warmly welcome you to buy bulk high quality flanged hex head bolts for sale here from our factory. Customized orders are welcome.
Product Overview
Flanged Hex Head Bolts are integrated fasteners combining hex head and flange face, produced in accordance with DIN6921, ISO4162 standards. The integrated flange replaces separate flat washers, evenly distributing clamping pressure and preventing loosening caused by washer displacement. When tightened, the flange surface closely fits the workpiece surface to improve sealing and anti-slip performance. Our factory manufactures supporting nuts internally and offers complete assembly kits to save customers' sourcing work. We offer carbon steel and stainless steel materials with various surface treatments, keep complete metric sizes in stock, and support customized length solutions for automotive, new energy and sheet metal assembly projects.
Product Specification
|
Parameter Item |
Standard Index |
|
Material |
Carbon steel, 304 stainless steel |
|
Strength Grade |
Class 4.8, Class 8.8, A2‑70 |
|
Thread Precision |
6g metric coarse thread |
|
Surface Treatment |
Electro-galvanized, black oxide, passivation |
|
Size Range |
M5 – M20 |
|
Executive Standards |
DIN6921, ISO4162 |
|
Structure |
Hex head with integrated flange (optional serrated flange) |
Product Properties
1. One-piece flange structure eliminates the need for separate washers, greatly improving on-site assembly efficiency;
2. Large flange surface disperses pressure effectively, avoiding indentation on thin sheet metal;
3. Serrated flange option provides extra friction resistance against vibration loosening;
4. Standard hexagon shape matches common spanners and automated assembly tools.
Application
Mainly used for automotive parts, photovoltaic brackets, electrical cabinet assembly, agricultural machinery, new energy equipment and sheet metal structural connection. Serrated flange types are preferred for high-vibration working conditions.
Quality Control & Testing
Each batch passes thread inspection, dimensional tolerance check and hardness test. Electroplated versions undergo salt spray testing. Material certificates and SGS inspection reports can be provided upon customer request.
Packing, Storage, Handling And Transportation
Standard packing: inner moisture-proof PE bags + outer woven bags, palletized for sea transport. Custom shipping marks are available. Store in dry warehouse to prevent rust. Multiple logistics terms including FOB, CIF, DDP are offered.
After‑Sales & Service
Our team recommends suitable surface treatment and flange type according to vibration intensity. Any factory-quality defects will be replaced free of charge with freight covered. Installation torque guidance is available.
FAQ
Q1: What is the difference between serrated flange and smooth flange bolts?
A: Serrated flange increases friction for anti-loosening; smooth flange protects finished workpiece surfaces from scratches.
Q2: Can you produce non-standard lengths?
A: Custom lengths are acceptable subject to minimum order quantity.
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